IBM Support

PM78504: ARM - REMOVE THE RESTRICTION OF RUNNING REQUEST METRICS FOR SERVLET IN DEBUG MODE ONLY

Fixes are available

8.5.5.2: WebSphere Application Server V8.5.5 Fix Pack 2
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.5.5.3: WebSphere Application Server V8.5.5 Fix Pack 3
8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

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APAR status

  • Closed as program error.

Error description

  • When using ARM with middleware components such as IHS8, WAS
    and DB2 the WebContainer will invoke a Servlet Filter, however,
    the Servlet Filter will not get the correlator from the
    WebContainer and arm stop is never issued.
    
    
    Transaction seem to never complete  and have a very long
    response time
    due to the missing arm_stop() call.
    

Local fix

  • Run Request Metrics for
    
    Servlet Filters only in  'Debug' mode.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V8.0 and V8.5                        *
    ****************************************************************
    * PROBLEM DESCRIPTION: When request is made from Servlet       *
    *                      Filter                                  *
    *                      to EJB, ARM.Stop call is not issued     *
    *                      from                                    *
    *                      the Websphere Request Metrics Code.     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Since the Request is coming from Filter to EJB and
    RequestMetrics doesn't instrument Filter at "HOPS" level of
    Request Metrics ,EJB is considered to be the Starting component
    and due to a bug present in this scenario Arm.Start is called
    but Arm.Stop is not called when request exits EJB container.Note
    that thought this APAR is tagged for z/OS this appears on all
    platforms.
    

Problem conclusion

  • The code has be modified to handle the above scenario and make
    sure that Arm.stop is called.
    
    APAR PM78504 is currently targeted for inclusion in Fix Packs
    of WebSphere Application Server 8.0.0.9 and 8.5.5.2.
    
    Please refer to the Recommended Updates page for delivery
    information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM78504

  • Reported component name

    WEBSPHERE FOR Z

  • Reported component ID

    5655I3500

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-12-05

  • Closed date

    2014-01-14

  • Last modified date

    2014-03-21

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    WEBSPHERE FOR Z

  • Fixed component ID

    5655I3500

Applicable component levels

  • R800 PSY

       UP

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Document Information

Modified date:
28 April 2022